Moved my personal site off of WordPress around 5 years ago because, for my single-user purposes it was resource heavy compared to a static site generator like Hugo or Pelican. I also had quite a lot of spam traffic, even with anti-spam plugins, and eventually I just disabled comments outright and the new user registration page. Admittedly, I was never that active with it, so I’m fully willing to accept that it could have been a me problem.
I also recall the general security of WordPress being a concern around that time, mostly because it was a popular target, so a big part of me moving to a static site generator was just to avoid having to constantly get on and update WordPress for security patches, when I only posted on the blog a few times a year at most.
Fediverse support has me considering returning to WordPress, but I’m curious how much upkeep running your own instance is these days.